diff options
| -rw-r--r-- | drivers/ata/ahci_imx.c | 168 |
1 files changed, 160 insertions, 8 deletions
diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c index 3a901520c62b..e032e95ddee3 100644 --- a/drivers/ata/ahci_imx.c +++ b/drivers/ata/ahci_imx.c @@ -62,6 +62,7 @@ struct imx_ahci_priv { struct regmap *gpr; bool no_device; bool first_time; + u32 phy_params; }; static int ahci_imx_hotplug; @@ -246,14 +247,7 @@ static int imx_sata_enable(struct ahci_host_priv *hpriv) IMX6Q_GPR13_SATA_TX_LVL_MASK | IMX6Q_GPR13_SATA_MPLL_CLK_EN | IMX6Q_GPR13_SATA_TX_EDGE_RATE, - IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB | - IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M | - IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F | - IMX6Q_GPR13_SATA_SPD_MODE_3P0G | - IMX6Q_GPR13_SATA_MPLL_SS_EN | - IMX6Q_GPR13_SATA_TX_ATTEN_9_16 | - IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB | - IMX6Q_GPR13_SATA_TX_LVL_1_025_V); + imxpriv->phy_params); regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, IMX6Q_GPR13_SATA_MPLL_CLK_EN, IMX6Q_GPR13_SATA_MPLL_CLK_EN); @@ -364,6 +358,152 @@ static const struct of_device_id imx_ahci_of_match[] = { }; MODULE_DEVICE_TABLE(of, imx_ahci_of_match); +struct reg_value { + u32 of_value; + u32 reg_value; +}; + +struct reg_property { + const char *name; + const struct reg_value *values; + size_t num_values; + u32 def_value; +}; + +static const struct reg_value gpr13_tx_level[] = { + { 937, IMX6Q_GPR13_SATA_TX_LVL_0_937_V }, + { 947, IMX6Q_GPR13_SATA_TX_LVL_0_947_V }, + { 957, IMX6Q_GPR13_SATA_TX_LVL_0_957_V }, + { 966, IMX6Q_GPR13_SATA_TX_LVL_0_966_V }, + { 976, IMX6Q_GPR13_SATA_TX_LVL_0_976_V }, + { 986, IMX6Q_GPR13_SATA_TX_LVL_0_986_V }, + { 996, IMX6Q_GPR13_SATA_TX_LVL_0_996_V }, + { 1005, IMX6Q_GPR13_SATA_TX_LVL_1_005_V }, + { 1015, IMX6Q_GPR13_SATA_TX_LVL_1_015_V }, + { 1025, IMX6Q_GPR13_SATA_TX_LVL_1_025_V }, + { 1035, IMX6Q_GPR13_SATA_TX_LVL_1_035_V }, + { 1045, IMX6Q_GPR13_SATA_TX_LVL_1_045_V }, + { 1054, IMX6Q_GPR13_SATA_TX_LVL_1_054_V }, + { 1064, IMX6Q_GPR13_SATA_TX_LVL_1_064_V }, + { 1074, IMX6Q_GPR13_SATA_TX_LVL_1_074_V }, + { 1084, IMX6Q_GPR13_SATA_TX_LVL_1_084_V }, + { 1094, IMX6Q_GPR13_SATA_TX_LVL_1_094_V }, + { 1104, IMX6Q_GPR13_SATA_TX_LVL_1_104_V }, + { 1113, IMX6Q_GPR13_SATA_TX_LVL_1_113_V }, + { 1123, IMX6Q_GPR13_SATA_TX_LVL_1_123_V }, + { 1133, IMX6Q_GPR13_SATA_TX_LVL_1_133_V }, + { 1143, IMX6Q_GPR13_SATA_TX_LVL_1_143_V }, + { 1152, IMX6Q_GPR13_SATA_TX_LVL_1_152_V }, + { 1162, IMX6Q_GPR13_SATA_TX_LVL_1_162_V }, + { 1172, IMX6Q_GPR13_SATA_TX_LVL_1_172_V }, + { 1182, IMX6Q_GPR13_SATA_TX_LVL_1_182_V }, + { 1191, IMX6Q_GPR13_SATA_TX_LVL_1_191_V }, + { 1201, IMX6Q_GPR13_SATA_TX_LVL_1_201_V }, + { 1211, IMX6Q_GPR13_SATA_TX_LVL_1_211_V }, + { 1221, IMX6Q_GPR13_SATA_TX_LVL_1_221_V }, + { 1230, IMX6Q_GPR13_SATA_TX_LVL_1_230_V }, + { 1240, IMX6Q_GPR13_SATA_TX_LVL_1_240_V } +}; + +static const struct reg_value gpr13_tx_boost[] = { + { 0, IMX6Q_GPR13_SATA_TX_BOOST_0_00_DB }, + { 370, IMX6Q_GPR13_SATA_TX_BOOST_0_37_DB }, + { 740, IMX6Q_GPR13_SATA_TX_BOOST_0_74_DB }, + { 1110, IMX6Q_GPR13_SATA_TX_BOOST_1_11_DB }, + { 1480, IMX6Q_GPR13_SATA_TX_BOOST_1_48_DB }, + { 1850, IMX6Q_GPR13_SATA_TX_BOOST_1_85_DB }, + { 2220, IMX6Q_GPR13_SATA_TX_BOOST_2_22_DB }, + { 2590, IMX6Q_GPR13_SATA_TX_BOOST_2_59_DB }, + { 2960, IMX6Q_GPR13_SATA_TX_BOOST_2_96_DB }, + { 3330, IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB }, + { 3700, IMX6Q_GPR13_SATA_TX_BOOST_3_70_DB }, + { 4070, IMX6Q_GPR13_SATA_TX_BOOST_4_07_DB }, + { 4440, IMX6Q_GPR13_SATA_TX_BOOST_4_44_DB }, + { 4810, IMX6Q_GPR13_SATA_TX_BOOST_4_81_DB }, + { 5280, IMX6Q_GPR13_SATA_TX_BOOST_5_28_DB }, + { 5750, IMX6Q_GPR13_SATA_TX_BOOST_5_75_DB } +}; + +static const struct reg_value gpr13_tx_atten[] = { + { 8, IMX6Q_GPR13_SATA_TX_ATTEN_8_16 }, + { 9, IMX6Q_GPR13_SATA_TX_ATTEN_9_16 }, + { 10, IMX6Q_GPR13_SATA_TX_ATTEN_10_16 }, + { 12, IMX6Q_GPR13_SATA_TX_ATTEN_12_16 }, + { 14, IMX6Q_GPR13_SATA_TX_ATTEN_14_16 }, + { 16, IMX6Q_GPR13_SATA_TX_ATTEN_16_16 }, +}; + +static const struct reg_value gpr13_rx_eq[] = { + { 500, IMX6Q_GPR13_SATA_RX_EQ_VAL_0_5_DB }, + { 1000, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_0_DB }, + { 1500, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_5_DB }, + { 2000, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_0_DB }, + { 2500, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_5_DB }, + { 3000, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB }, + { 3500, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_5_DB }, + { 4000, IMX6Q_GPR13_SATA_RX_EQ_VAL_4_0_DB }, +}; + +static const struct reg_property gpr13_props[] = { + { + .name = "fsl,transmit-level-mV", + .values = gpr13_tx_level, + .num_values = ARRAY_SIZE(gpr13_tx_level), + .def_value = IMX6Q_GPR13_SATA_TX_LVL_1_025_V, + }, { + .name = "fsl,transmit-boost-mdB", + .values = gpr13_tx_boost, + .num_values = ARRAY_SIZE(gpr13_tx_boost), + .def_value = IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB, + }, { + .name = "fsl,transmit-atten-16ths", + .values = gpr13_tx_atten, + .num_values = ARRAY_SIZE(gpr13_tx_atten), + .def_value = IMX6Q_GPR13_SATA_TX_ATTEN_9_16, + }, { + .name = "fsl,receive-eq-mdB", + .values = gpr13_rx_eq, + .num_values = ARRAY_SIZE(gpr13_rx_eq), + .def_value = IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB, + }, +}; + +static u32 imx_ahci_parse_props(struct device *dev, + const struct reg_property *prop, size_t num) +{ + struct device_node *np = dev->of_node; + u32 reg_value = 0; + int i, j; + + for (i = 0; i < num; i++, prop++) { + u32 of_val; + + if (of_property_read_u32(np, prop->name, &of_val)) { + dev_info(dev, "%s not specified, using %08x\n", + prop->name, prop->def_value); + reg_value |= prop->def_value; + continue; + } + + for (j = 0; j < prop->num_values; j++) { + if (prop->values[j].of_value == of_val) { + dev_info(dev, "%s value %u, using %08x\n", + prop->name, of_val, prop->values[j].reg_value); + reg_value |= prop->values[j].reg_value; + break; + } + } + + if (j == prop->num_values) { + dev_err(dev, "DT property %s is not a valid value\n", + prop->name); + reg_value |= prop->def_value; + } + } + + return reg_value; +} + static int imx_ahci_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -392,6 +532,8 @@ static int imx_ahci_probe(struct platform_device *pdev) } if (imxpriv->type == AHCI_IMX6Q) { + u32 reg_value; + imxpriv->gpr = syscon_regmap_lookup_by_compatible( "fsl,imx6q-iomuxc-gpr"); if (IS_ERR(imxpriv->gpr)) { @@ -399,6 +541,16 @@ static int imx_ahci_probe(struct platform_device *pdev) "failed to find fsl,imx6q-iomux-gpr regmap\n"); return PTR_ERR(imxpriv->gpr); } + + reg_value = imx_ahci_parse_props(dev, gpr13_props, + ARRAY_SIZE(gpr13_props)); + + imxpriv->phy_params = + IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M | + IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F | + IMX6Q_GPR13_SATA_SPD_MODE_3P0G | + IMX6Q_GPR13_SATA_MPLL_SS_EN | + reg_value; } hpriv = ahci_platform_get_resources(pdev); |